/*
 * The MIT License
 * Copyright © 2014-2019 Ilkka Seppälä
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package com.iluwatar.roleobject;

import java.util.*;

/**
 * Core class to store different customer roles
 *
 * @see CustomerRole
 * Note: not thread safe
 */
public class CustomerCore extends Customer {

    private Map<Role, CustomerRole> roles;

    public CustomerCore() {
        roles = new HashMap<>();
    }

    @Override
    public boolean addRole(Role role) {
        return role
                .instance()
                .map(inst -> {
                    roles.put(role, inst);
                    return true;
                })
                .orElse(false);
    }

    @Override
    public boolean hasRole(Role role) {
        return roles.containsKey(role);
    }

    @Override
    public boolean remRole(Role role) {
        return Objects.nonNull(roles.remove(role));
    }

    @Override
    public <T extends Customer> Optional<T> getRole(Role role, Class<T> expectedRole) {
        return Optional
                .ofNullable(roles.get(role))
                .filter(expectedRole::isInstance)
                .map(expectedRole::cast);
    }

    @Override
    public String toString() {
        String roles = Arrays.toString(this.roles.keySet().toArray());
        return "Customer{roles=" + roles + "}";
    }
}
